Enable import.meta by default in @babel/parser (#11364)

packages/babel-parser/src/parser/expression.js

@@ -1227,8 +1227,6 @@ export default class ExpressionParser extends LValParser {
     this.expect(tt.dot);
 
     if (this.isContextual("meta")) {
-      this.expectPlugin("importMeta");
-
       if (!this.inModule) {
         this.raiseWithData(
           id.start,
@@ -1237,8 +1235,6 @@ export default class ExpressionParser extends LValParser {
         );
       }
       this.sawUnambiguousESM = true;
-    } else if (!this.hasPlugin("importMeta")) {
-      this.raise(id.start, Errors.ImportCallArityLtOne);
     }
 
     return this.parseMetaProperty(node, id, "meta");

packages/babel-parser/src/parser/location.js

@@ -68,7 +68,6 @@ export const Errors = Object.freeze({
   ImportCallArgumentTrailingComma:
     "Trailing comma is disallowed inside import(...) arguments",
   ImportCallArity: "import() requires exactly one argument",
-  ImportCallArityLtOne: "Dynamic imports require a parameter: import('a.js')",
   ImportCallNotNewExpression: "Cannot use new with import(...)",
   ImportCallSpreadArgument: "... is not allowed in import()",
   ImportMetaOutsideModule: `import.meta may appear only with 'sourceType: "module"'`,

packages/babel-parser/test/fixtures/core/sourcetype-unambiguous/import-meta/output.json

@@ -49,4 +49,4 @@
     ],
     "directives": []
   }
-}
+}

packages/babel-parser/test/fixtures/es2020/dynamic-import/direct-calls-only/output.json

@@ -2,7 +2,6 @@
   "type": "File",
   "start":0,"end":49,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
   "errors": [
-    "SyntaxError: Dynamic imports require a parameter: import('a.js') (2:9)",
     "SyntaxError: The only valid meta property for import is import.meta (2:16)"
   ],
   "program": {

packages/babel-parser/test/fixtures/experimental/import-meta/error-in-script/options.json → packages/babel-parser/test/fixtures/es2020/import-meta/error-in-script/options.json

@@ -1,4 +1,3 @@
 {
-  "plugins": ["importMeta"],
   "sourceType": "script"
 }

packages/babel-parser/test/fixtures/es2020/import-meta/no-other-prop-names/options.json

@@ -0,0 +1,3 @@
+{
+  "sourceType": "module"
+}

packages/babel-parser/test/fixtures/es2020/import-meta/not-assignable/options.json

@@ -0,0 +1,3 @@
+{
+  "sourceType": "module"
+}

packages/babel-parser/test/fixtures/es2020/import-meta/valid-in-module/options.json

@@ -0,0 +1,3 @@
+{
+  "sourceType": "module"
+}