ios: Stop passing -Wno-deprecated-declarations for host builds.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index a18f96da60bd991a7bf5a6870a38bae5885cd495..934c137826be02c7218ef8bcb46e630731ef37cc 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -5430,17 +5430,6 @@
               'ARCHS': [
                 'x86_64',
               ],
-              'WARNING_CFLAGS': [
-                # TODO(thakis): Remove this once the deployment target on OS X
-                # is 10.7 too, http://crbug.com/547071
-                # In general, it is NOT OK to add -Wno-deprecated-declarations
-                # anywhere, you should instead fix your code instead.  But host
-                # compiles on iOS are really mac compiles, so this will be fixed
-                # when the mac deployment target is increased.  (Some of the
-                # fixes depend on OS X 10.7 so they can't be done before mac
-                # upgrades).
-                '-Wno-deprecated-declarations',
-              ],
             },
           }],
           ['_toolset=="target"', {