Remove unnecessary and ambiguous sentences

Author: JeromeMartinez

ffv1.md

@@ -303,9 +303,7 @@ The Y plane MUST be coded first. If the Cb and Cr planes are used then they MUST
 
 ## Pixel transformations
 
-Pixel transformations permit to modify the pixel data in a reversible way in order to improve the compression ratio, before being encoded. An example of usage is to compress RGB content which could have each component independently compressed but with a less optimal compression ratio.
-
-Pixel transformation is indicated in the bitstream in order to permit the decoder to configure the output accordingly to encoder input.
+Pixel transformations permit to modify the pixel data before being encoded. An example of usage is to compress RGB content which could have each component independently compressed but with a less optimal compression ratio.
 
 ### No Pixel transformation