rubocop-performance.yml in gitlab-styles-2.5.2 vs rubocop-performance.yml in gitlab-styles-2.6.0

@@ -9,14 +9,10 @@
 # Use `str.{start,end}_with?(x, ..., y, ...)` instead of
 # `str.{start,end}_with?(x, ...) || str.{start,end}_with?(y, ...)`.
 Performance/DoubleStartEndWith:
   Enabled: true
 
-# Use `strip` instead of `lstrip.rstrip`.
-Performance/LstripRstrip:
-  Enabled: true
-
 # Use `Range#cover?` instead of `Range#include?`.
 Performance/RangeInclude:
   Enabled: true
 
 # This cop identifies the use of a `&block` parameter and `block.call`
@@ -32,13 +28,9 @@
 # This cop identifies places where `Hash#merge!` can be replaced by
 # `Hash#[]=`.
 Performance/RedundantMerge:
   Enabled: true
   MaxKeyValuePairs: 1
-
-# Use `sort` instead of `sort_by { |x| x }`.
-Performance/RedundantSortBy:
-  Enabled: true
 
 # Use `start_with?` instead of a regex match anchored to the beginning of a
 # string.
 Performance/StartWith:
   Enabled: true