Revert "Clicking a link in the HTML reporter does exact filtering"

This change broke spec filtering in Karma by changing the format of the
`spec` query parameter. Although karma-jasmine-html-reporter uses
jasmine-core's HtmlSpecFilter, karm-jasmine provides its own spec filter
that interprets the query parameters itself.

This feature may be reintroduced in 6.0 as a breaking change.

This reverts commit 8309416cb2.

spec/html/HtmlSpecFilterSpec.js

@@ -1,4 +1,4 @@
-describe('HtmlSpecFilter', function() {
+describe('jasmineUnderTest.HtmlSpecFilter', function() {
   it('should match when no string is provided', function() {
     const specFilter = new jasmineUnderTest.HtmlSpecFilter();
 
@@ -16,17 +16,4 @@ describe('HtmlSpecFilter', function() {
     expect(specFilter.matches('foo')).toBe(true);
     expect(specFilter.matches('bar')).toBe(false);
   });
-
-  it('copes with HtmlExactSpecFilterV2 filter strings', function() {
-    const specFilter = new jasmineUnderTest.HtmlSpecFilter({
-      filterString: function() {
-        return '["foo","bar"]';
-      }
-    });
-
-    expect(specFilter.matches('foo bar')).toBe(true);
-    expect(specFilter.matches('baz foo bar qux')).toBe(true);
-    expect(specFilter.matches('foo')).toBe(false);
-    expect(specFilter.matches('bar')).toBe(false);
-  });
 });