IVGCVSW-4475 Update BuildGuideAndroidNDK.md

 * Remove export keyword

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: If505923c8283a352a02956621074174f423adb07
diff --git a/BuildGuideAndroidNDK.md b/BuildGuideAndroidNDK.md
index fd64e4a..3e3a0bb9d 100644
--- a/BuildGuideAndroidNDK.md
+++ b/BuildGuideAndroidNDK.md
@@ -286,7 +286,7 @@
 * Run ArmNN unit tests:
 
 	```bash
-	adb shell 'export LD_LIBRARY_PATH=/data/local/tmp:/vendor/lib64:/vendor/lib64/egl /data/local/tmp/UnitTests'
+	adb shell 'LD_LIBRARY_PATH=/data/local/tmp:/vendor/lib64:/vendor/lib64/egl /data/local/tmp/UnitTests'
 	```
 
 	If libarmnnUtils.a is present in `~/armnn-devenv/armnn/build/` and the unit tests run without failure then the build was successful.