Revert "Add missing languages"

This reverts commit 5db95d0138123a8d5922508e8ee53f7c37f52962.

Reason for revert: additional locales can be added via CUSTOM_LOCALES.

Change-Id: I9b53184f77822b06f81f8afd5818356d3133635b
diff --git a/target/product/languages_default.mk b/target/product/languages_default.mk
index 70fbefa..a13a23c 100644
--- a/target/product/languages_default.mk
+++ b/target/product/languages_default.mk
@@ -103,9 +103,3 @@
         zh_HK \
         zh_TW \
         zu_ZA \
-
-# LineageOS specific languages
-PRODUCT_LOCALES += \
-        ast_ES \
-        gd_GB \
-        cy_GB