Clean up unnecessary data_connection_5g_plus overlay

This string is not device specific, and already set at,
frameworks/base/packages/SettingsLib/res/values-mcc311-mnc480/strings.xml
frameworks/base/packages/SettingsLib/res/values-mcc310-mnc004/strings.xml

Bug: 377907543
Flag: EXEMPT clean up
Test: m
Change-Id: I642831bcac95e705bbee73e2b0566214dc370d5b
2 files changed