polly: remove the old reference to svn in the doc

GitOrigin-RevId: c22bd391bc68097a4614a895e5e58d10501a2661
diff --git a/docs/UsingPollyWithClang.rst b/docs/UsingPollyWithClang.rst
index d203324..08fdcbc 100644
--- a/docs/UsingPollyWithClang.rst
+++ b/docs/UsingPollyWithClang.rst
@@ -8,7 +8,7 @@
 
 .. warning::
 
-  Warning: clang/LLVM/Polly need to be in sync (compiled from the same SVN
+  Warning: clang/LLVM/Polly need to be in sync (compiled from the same
   revision).
 
 Make Polly available from Clang