Revert "fix(zod): allow blank value for non-required enums (#1113)" (#1116)

This reverts commit 1edc2ab.

Author: Eric Butler

packages/zod/src/index.ts

@@ -214,13 +214,14 @@ const generateZodValidationSchemaDefinition = (
   }
 
   if (schema.enum && type !== 'number') {
-    const enumValues = schema.enum.map((value) =>
-      isString(value) ? `'${escape(value)}'` : `${value}`,
-    );
-    if (!schema.required) {
-      enumValues.push(`""`);
-    }
-    functions.push(['enum', [`[${enumValues.join(', ')}]`]]);
+    functions.push([
+      'enum',
+      [
+        `[${schema.enum
+          .map((value) => (isString(value) ? `'${escape(value)}'` : `${value}`))
+          .join(', ')}]`,
+      ],
+    ]);
   }
 
   if (!required && nullable) {