diff --git a/src/internal/observable/concat.ts b/src/internal/observable/concat.ts
index 8414e39ef7..a75542c9ca 100644
--- a/src/internal/observable/concat.ts
+++ b/src/internal/observable/concat.ts
@@ -1,8 +1,6 @@
 import { Observable } from '../Observable';
 import { ObservableInput, SchedulerLike, ObservedValueOf } from '../types';
-import { isScheduler } from '../util/isScheduler';
 import { of } from './of';
-import { from } from './from';
 import { concatAll } from '../operators/concatAll';
 
 /* tslint:disable:max-line-length */
diff --git a/src/internal/observable/defer.ts b/src/internal/observable/defer.ts
index 5755abbf6e..02db3d449c 100644
--- a/src/internal/observable/defer.ts
+++ b/src/internal/observable/defer.ts
@@ -1,5 +1,5 @@
 import { Observable } from '../Observable';
-import { SubscribableOrPromise, ObservedValueOf, ObservableInput } from '../types';
+import { ObservedValueOf, ObservableInput } from '../types';
 import { from } from './from'; // lol
 import { empty } from './empty';
 
diff --git a/src/internal/operators/elementAt.ts b/src/internal/operators/elementAt.ts
index 5cee9830ca..60af70dcd7 100644
--- a/src/internal/operators/elementAt.ts
+++ b/src/internal/operators/elementAt.ts
@@ -1,5 +1,3 @@
-import { Operator } from '../Operator';
-import { Subscriber } from '../Subscriber';
 import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
 import { Observable } from '../Observable';
 import { MonoTypeOperatorFunction, TeardownLogic } from '../types';
diff --git a/src/internal/operators/first.ts b/src/internal/operators/first.ts
index 80ad111271..7dfde4228a 100644
--- a/src/internal/operators/first.ts
+++ b/src/internal/operators/first.ts
@@ -1,6 +1,4 @@
 import { Observable } from '../Observable';
-import { Operator } from '../Operator';
-import { Subscriber } from '../Subscriber';
 import { EmptyError } from '../util/EmptyError';
 import { OperatorFunction } from '../../internal/types';
 import { filter } from './filter';
diff --git a/src/internal/operators/last.ts b/src/internal/operators/last.ts
index 23626c5749..41b3e9332c 100644
--- a/src/internal/operators/last.ts
+++ b/src/internal/operators/last.ts
@@ -1,6 +1,4 @@
 import { Observable } from '../Observable';
-import { Operator } from '../Operator';
-import { Subscriber } from '../Subscriber';
 import { EmptyError } from '../util/EmptyError';
 import { OperatorFunction } from '../../internal/types';
 import { filter } from './filter';
diff --git a/src/internal/operators/mergeAll.ts b/src/internal/operators/mergeAll.ts
index 6659290fad..90a6d5fa17 100644
--- a/src/internal/operators/mergeAll.ts
+++ b/src/internal/operators/mergeAll.ts
@@ -1,4 +1,3 @@
-
 import { mergeMap } from './mergeMap';
 import { identity } from '../util/identity';
 import { OperatorFunction, ObservableInput } from '../types';
diff --git a/src/internal/operators/mergeMapTo.ts b/src/internal/operators/mergeMapTo.ts
index 6f7e62fb66..f91fa8f63c 100644
--- a/src/internal/operators/mergeMapTo.ts
+++ b/src/internal/operators/mergeMapTo.ts
@@ -1,4 +1,3 @@
-import { Observable } from '../Observable';
 import { OperatorFunction, ObservedValueOf } from '../../internal/types';
 import { mergeMap } from './mergeMap';
 import { ObservableInput } from '../types';
diff --git a/src/internal/operators/multicast.ts b/src/internal/operators/multicast.ts
index 97d28d5578..3531745db3 100644
--- a/src/internal/operators/multicast.ts
+++ b/src/internal/operators/multicast.ts
@@ -3,7 +3,7 @@ import { Operator } from '../Operator';
 import { Subscriber } from '../Subscriber';
 import { Observable } from '../Observable';
 import { ConnectableObservable, connectableObservableDescriptor } from '../observable/ConnectableObservable';
-import { MonoTypeOperatorFunction, OperatorFunction, UnaryFunction, ObservedValueOf, ObservableInput } from '../types';
+import { OperatorFunction, UnaryFunction, ObservedValueOf, ObservableInput } from '../types';
 
 /* tslint:disable:max-line-length */
 export function multicast<T>(subject: Subject<T>): UnaryFunction<Observable<T>, ConnectableObservable<T>>;
diff --git a/src/internal/operators/switchMapTo.ts b/src/internal/operators/switchMapTo.ts
index 84424744d4..dc71e4408a 100644
--- a/src/internal/operators/switchMapTo.ts
+++ b/src/internal/operators/switchMapTo.ts
@@ -1,10 +1,3 @@
-import { Operator } from '../Operator';
-import { Observable } from '../Observable';
-import { Subscriber } from '../Subscriber';
-import { Subscription } from '../Subscription';
-import { OuterSubscriber } from '../OuterSubscriber';
-import { InnerSubscriber } from '../InnerSubscriber';
-import { subscribeToResult } from '../util/subscribeToResult';
 import { ObservableInput, OperatorFunction } from '../types';
 import { switchMap } from './switchMap';
 
diff --git a/src/internal/operators/timeInterval.ts b/src/internal/operators/timeInterval.ts
index 7ee73dbc25..d228651363 100644
--- a/src/internal/operators/timeInterval.ts
+++ b/src/internal/operators/timeInterval.ts
@@ -1,4 +1,3 @@
-
 import { Observable } from '../Observable';
 import { async } from '../scheduler/async';
 import { SchedulerLike, OperatorFunction } from '../types';
diff --git a/src/internal/operators/timeout.ts b/src/internal/operators/timeout.ts
index b049e73001..34718d8ac9 100644
--- a/src/internal/operators/timeout.ts
+++ b/src/internal/operators/timeout.ts
@@ -1,8 +1,4 @@
 import { async } from '../scheduler/async';
-import { isDate } from '../util/isDate';
-import { Operator } from '../Operator';
-import { Subscriber } from '../Subscriber';
-import { Observable } from '../Observable';
 import { TimeoutError } from '../util/TimeoutError';
 import { MonoTypeOperatorFunction, SchedulerAction, SchedulerLike, TeardownLogic } from '../types';
 import { timeoutWith } from './timeoutWith';
diff --git a/src/internal/operators/timestamp.ts b/src/internal/operators/timestamp.ts
index d4061c8c45..c2ee0d3af7 100644
--- a/src/internal/operators/timestamp.ts
+++ b/src/internal/operators/timestamp.ts
@@ -1,4 +1,3 @@
-
 import { async } from '../scheduler/async';
 import { OperatorFunction, SchedulerLike, Timestamp as TimestampInterface } from '../types';
 import { map } from './map';
diff --git a/src/internal/util/isObservable.ts b/src/internal/util/isObservable.ts
index f3df52485b..b6f3f38ebd 100644
--- a/src/internal/util/isObservable.ts
+++ b/src/internal/util/isObservable.ts
@@ -1,5 +1,4 @@
 import { Observable } from '../Observable';
-import { ObservableInput } from '../types';
 
 /**
  * Tests to see if the object is an RxJS {@link Observable}