Merge duplicated imports (#1432)

Author: IvanGoncharov

src/utilities/buildASTSchema.js

@@ -42,6 +42,9 @@ import type {
 import type { DirectiveLocationEnum } from '../language/directiveLocation';
 
 import type {
+  GraphQLType,
+  GraphQLNamedType,
+  GraphQLFieldConfig,
   GraphQLEnumValueConfig,
   GraphQLInputField,
 } from '../type/definition';
@@ -72,12 +75,6 @@ import { specifiedScalarTypes } from '../type/scalars';
 import { GraphQLSchema } from '../type/schema';
 import type { GraphQLSchemaValidationOptions } from '../type/schema';
 
-import type {
-  GraphQLType,
-  GraphQLNamedType,
-  GraphQLFieldConfig,
-} from '../type/definition';
-
 export type BuildSchemaOptions = {
   ...GraphQLSchemaValidationOptions,
 

src/utilities/extendSchema.js

@@ -20,6 +20,8 @@ import { isSpecifiedScalarType } from '../type/scalars';
 import type { GraphQLSchemaValidationOptions } from '../type/schema';
 
 import type {
+  GraphQLType,
+  GraphQLNamedType,
   GraphQLArgument,
   GraphQLFieldConfigArgumentMap,
 } from '../type/definition';
@@ -47,7 +49,6 @@ import { GraphQLDirective } from '../type/directives';
 
 import { Kind } from '../language/kinds';
 
-import type { GraphQLType, GraphQLNamedType } from '../type/definition';
 import type {
   DocumentNode,
   DirectiveDefinitionNode,