Revert "Unified default lang redirect from m. & zero. Adding three carriers for testing, too."

VCL syntax error

This reverts commit 873b49eb17fceca21c418517c2f03bb02585f1c5

Change-Id: I750750a52cfe48a1916d1a2b997b85876cae3ddd
Merge "Revert "Unified default lang redirect from m. & zero. Adding three carriers for testing, too."" into production