Removed most of the gyp file, and the tests for it

There seems to be a bug in node-gyp (nodejs/node-gyp#752) that prevents
it from working properly with other gyp files.

templates/grpc.gyp.template

@@ -91,7 +91,7 @@
     'targets': [
       % for lib in libs:
       # TODO: Add C++ targets
-      % if lib.language == 'c':
+      % if lib.name == 'gpr' or lib.name == 'grpc':
       {
         'target_name': '${lib.name}',
         'product_prefix': 'lib',
@@ -109,23 +109,5 @@
       },
       % endif
       % endfor
-      % for tgt in targets:
-      % if tgt.language == 'c':
-      {
-        'target_name': '${tgt.name}',
-        'type': 'executable',
-        'dependencies': [
-          % for dep in getattr(tgt, 'deps', []):
-          '${dep}',
-          % endfor
-        ],
-        'sources': [
-          % for source in tgt.src:
-          '${source}',
-          % endfor
-        ]
-      },
-      % endif
-      % endfor
     ]
   }

tools/run_tests/run_tests.py

@@ -181,45 +181,6 @@ class CLanguage(object):
   def __str__(self):
     return self.make_target
 
-
-def gyp_test_paths(travis, config=None):
-  binaries = get_c_tests(travis, 'c')
-  out = []
-  for target in binaries:
-    if config is not None and config.build_config in target['exclude_configs']:
-        continue
-    binary = 'out/Debug/%s' % target['name']
-    out.append(binary)
-  return sorted(out)
-
-
-class GYPCLanguage(object):
-
-  def test_specs(self, config, travis):
-    return [config.job_spec([binary], [binary])
-            for binary in gyp_test_paths(travis, config)]
-
-  def pre_build_steps(self):
-    return [['gyp', '--depth=.', '--suffix=-gyp', 'grpc.gyp']]
-
-  def make_targets(self):
-    # HACK(ctiller): force fling_client and fling_server to be built, as fling_test
-    # needs these
-    return gyp_test_paths(False) + ['fling_client', 'fling_server']
-
-  def build_steps(self):
-    return []
-
-  def makefile_name(self):
-    return 'Makefile-gyp'
-
-  def supports_multi_config(self):
-    return False
-
-  def __str__(self):
-    return 'gyp'
-
-
 class NodeLanguage(object):
 
   def test_specs(self, config, travis):
@@ -230,7 +191,7 @@ class NodeLanguage(object):
     return []
 
   def make_targets(self):
-    return ['static_c', 'shared_c']
+    return []
 
   def build_steps(self):
     return [['tools/run_tests/build_node.sh']]
@@ -483,7 +444,6 @@ _DEFAULT = ['opt']
 _LANGUAGES = {
     'c++': CLanguage('cxx', 'c++'),
     'c': CLanguage('c', 'c'),
-    'gyp': GYPCLanguage(),
     'node': NodeLanguage(),
     'php': PhpLanguage(),
     'python': PythonLanguage(),