Fixed a typo (the word "uses" appeared twice) (pandas-dev#27710)

Author: MKhalusova

doc/source/development/roadmap.rst

@@ -96,7 +96,7 @@ Decoupling of indexing and internals
 
 The code for getting and setting values in pandas' data structures needs refactoring.
 In particular, we must clearly separate code that converts keys (e.g., the argument
-to ``DataFrame.loc``) to positions from code that uses uses these positions to get
+to ``DataFrame.loc``) to positions from code that uses these positions to get
 or set values. This is related to the proposed BlockManager rewrite. Currently, the
 BlockManager sometimes uses label-based, rather than position-based, indexing.
 We propose that it should only work with positional indexing, and the translation of keys