stop setting ios_sdk_version in bazelrc
stop setting ios_sdk_version in bazelrc

Change-Id: Ic635b01fb0b8d1ae2ed256f59331c8393943eff2

bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration