Remove deprecated assertValidName & isValidNameError (#3572)

Author: IvanGoncharov

.c8rc.json

@@ -7,7 +7,6 @@
     "src/jsutils/Maybe.ts",
     "src/jsutils/ObjMap.ts",
     "src/jsutils/PromiseOrValue.ts",
-    "src/utilities/assertValidName.ts",
     "src/utilities/typedQueryDocumentNode.ts"
   ],
   "clean": true,

src/index.ts

@@ -443,10 +443,6 @@ export {
   isEqualType,
   isTypeSubTypeOf,
   doTypesOverlap,
-  // Asserts a string is a valid GraphQL name.
-  assertValidName,
-  // Determine if a string is a valid GraphQL name.
-  isValidNameError,
   // Compares two GraphQLSchemas and detects breaking changes.
   BreakingChangeType,
   DangerousChangeType,

src/utilities/assertValidName.ts

@@ -86,9 +86,6 @@ export {
   doTypesOverlap,
 } from './typeComparators';
 
-// Asserts that a string is a valid GraphQL name
-export { assertValidName, isValidNameError } from './assertValidName';
-
 // Compares two GraphQLSchemas and detects breaking changes.
 export {
   BreakingChangeType,