remove pkg/mock

pkg/pkg.status

Index: pkg/pkg.status
diff --git a/pkg/pkg.status b/pkg/pkg.status
index d7c9eaf5ad6a391025914cda500bd1bde6fb0f09..afbb77b9c7570434e890b7d52f867792a2556ad5 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -107,11 +107,6 @@ typed_data/test/typed_buffers_test: RuntimeError
 analyzer/test/generated/all_the_rest_test: Fail # Issue 21772
 
 [ $compiler == dartanalyzer || $compiler == dart2analyzer ]
-# These tests are runtime negative but statically positive, so we skip
-# them in the analyzer.
-mock/test/mock_regexp_negative_test: Skip
-mock/test/mock_stepwise_negative_test: Skip
-
 compiler/samples/compile_loop/compile_loop: CompileTimeError  # Issue 16524
 
 [ $compiler == dart2js && $csp ]
@@ -647,9 +642,6 @@ _internal/lib/pub/test/validator/utf8_readme_test: Crash # unsupported element k
 _internal/lib/pub/test/version_solver_test: Crash #  try/finally
 js_ast/test/printer_callback_test: Crash # Please triage this failure.
 microlytics/test/dart_microlytics_test: Crash # (throw new ExpectException(message)): Unhandled node
-mock/test/mock_regexp_negative_test: Crash # Instance of 'TypeOperator': unimplemented in CodeGenerator
-mock/test/mock_stepwise_negative_test: Crash # cannot compile methods that need interceptor calling convention.
-mock/test/mock_test: Crash # Instance of 'TypeOperator': unimplemented in CodeGenerator
 stub_core_library/test/stub_test: Crash #  try/finally
 third_party/di_tests/di_test: Crash #  try/finally
 typed_data/test/typed_buffers_test/01: Crash # cannot compile methods that need interceptor calling convention.