Removing --experimental_strict_conflict_checks flag (#2336)

Removing --experimental_strict_conflict_checks as flag was deleted from
Bazel@HEAD:
bazelbuild/bazel@febfa54

Fixes : #2337

.bazelrc

@@ -1,9 +1,6 @@
 # NOTE: These are mainly just for the BazelCI setup so they don't have
 # to be repeated multiple times in .bazelci/presubmit.yml.
 
-# https://github.com/bazelbuild/bazel/issues/16729
-build --experimental_strict_conflict_checks
-
 # https://github.com/bazelbuild/stardoc/issues/112
 common --incompatible_allow_tags_propagation