README.md: We don't build libosmotrau.  The latter is in libosmo-abis.git

Change-Id: Ida773c9611075cc02f017eb5606f94a65cac8533
diff --git a/README.md b/README.md
index d3c63ab..07c1a2a 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,6 @@
 * **libosmocodec** contains an implementation of GSM voice codecs
 * **libosmocoding** contains an implementation of GSM channel coding
 * **libosmosim** contains infrastructure to interface SIM/UICC/USIM cards
-* **libosmotrau** contains encoding/decoding functions for A-bis TRAU frames
 
 
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