fix(testing): remove the toMatchPattern matcher (jasmine has toMatch)

BREAKING CHANGE:

Before:

    expect(...).toMatchPattern(pattern);

After:

    expect(...).toMatch(pattern);

modules/@angular/core/test/testing_internal_spec.ts

@@ -27,14 +27,6 @@ export function main() {
       });
     });
 
-    describe('toMatchPAttern', () => {
-      it('should assert that a string matches a given pattern', () => {
-        expect('matias').toMatchPattern(/ias$/g);
-        expect('tobias').toMatchPattern(/ias$/g);
-        expect('joonas').not.toMatchPattern(/ias$/g);
-      });
-    });
-
     describe('toEqual for Maps', () => {
       it('should detect equality for same reference', () => {
         var m1 = MapWrapper.createFromStringMap({'a': 1});