Revert "Use assert_match / assert_no_match for asserting match"

This reverts commit e9651deea4.

Now we're having both `=~` and `match?` for these objects, and it's nicer to have explicit tests for both of them

actionpack/test/dispatch/mime_type_test.rb

@@ -167,12 +167,12 @@ class MimeTypeTest < ActiveSupport::TestCase
   end
 
   test "regexp matcher" do
-    assert_match Mime[:js], "text/javascript"
+    assert Mime[:js] =~ "text/javascript"
-    assert_match Mime[:js], "application/javascript"
+    assert Mime[:js] =~ "application/javascript"
-    assert_no_match Mime[:js], "text/html"
+    assert Mime[:js] !~ "text/html"
-    assert_match Mime[:js], "text/javascript"
+    assert_not (Mime[:js] !~ "text/javascript")
-    assert_match Mime[:js], "application/javascript"
+    assert_not (Mime[:js] !~ "application/javascript")
-    assert_match Mime[:html], "application/xhtml+xml"
+    assert Mime[:html] =~ "application/xhtml+xml"
   end
 
   test "match?" do

activesupport/test/time_zone_test.rb

@@ -712,9 +712,9 @@ class TimeZoneTest < ActiveSupport::TestCase
 
   def test_zone_match
     zone = ActiveSupport::TimeZone["Eastern Time (US & Canada)"]
-    assert_match zone, /Eastern/
+    assert zone =~ /Eastern/
-    assert_match zone, /New_York/
+    assert zone =~ /New_York/
-    assert_no_match zone, /Nonexistent_Place/
+    assert zone !~ /Nonexistent_Place/
   end
 
   def test_zone_match?