refactor(jest): remove version qualifiers in v27 facade impl (#4950)

remove the import aliases used in `jest-facade.ts`. the aliases were
renaming the imports to be '27-specific'. however, we're already in a
'jest-27' directory and working on the `Jest27Stencil` class (which is
kept with the '27' to help differentiate this class further). having
these extra import aliases made the instructions for adding a new
version of jest more onerous than it needed to be

Author: rwaskiewicz

src/testing/jest/jest-27-and-under/jest-facade.ts

@@ -1,45 +1,45 @@
 import { JestFacade } from '../jest-facade';
-import { createJestPuppeteerEnvironment as createJestPuppeteerEnvironment27 } from './jest-environment';
-import { jestPreprocessor as jestPreprocessor27 } from './jest-preprocessor';
-import { preset as jestPreset27 } from './jest-preset';
-import { createTestRunner as createTestRunner27 } from './jest-runner';
-import { runJest as runJest27 } from './jest-runner';
-import { runJestScreenshot as runJestScreenshot27 } from './jest-screenshot';
-import { jestSetupTestFramework as jestSetupTestFramework27 } from './jest-setup-test-framework';
+import { createJestPuppeteerEnvironment } from './jest-environment';
+import { jestPreprocessor } from './jest-preprocessor';
+import { preset } from './jest-preset';
+import { createTestRunner } from './jest-runner';
+import { runJest } from './jest-runner';
+import { runJestScreenshot } from './jest-screenshot';
+import { jestSetupTestFramework } from './jest-setup-test-framework';
 
 /**
  * `JestFacade` implementation for communicating between this directory's version of Jest and Stencil
  */
 export class Jest27Stencil implements JestFacade {
   getJestCliRunner() {
-    return runJest27;
+    return runJest;
   }
 
   getRunJestScreenshot() {
-    return runJestScreenshot27;
+    return runJestScreenshot;
   }
 
   getDefaultJestRunner() {
     return 'jest-jasmine2';
   }
 
   getCreateJestPuppeteerEnvironment() {
-    return createJestPuppeteerEnvironment27;
+    return createJestPuppeteerEnvironment;
   }
 
   getJestPreprocessor() {
-    return jestPreprocessor27;
+    return jestPreprocessor;
   }
 
   getCreateJestTestRunner() {
-    return createTestRunner27;
+    return createTestRunner;
   }
 
   getJestSetupTestFramework() {
-    return jestSetupTestFramework27;
+    return jestSetupTestFramework;
   }
 
   getJestPreset() {
-    return jestPreset27;
+    return preset;
   }
 }