Fix syntax error in fvp-ts.xml

In the OP-TEE 3.19.0 stable release the fvp-ts.xml contains a syntax
error, fix this.

Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
diff --git a/fvp-ts.xml b/fvp-ts.xml
index 83508b2..1c4d23e 100644
--- a/fvp-ts.xml
+++ b/fvp-ts.xml
@@ -6,7 +6,7 @@
 
         <!-- OP-TEE gits -->
         <!-- Need to remove and re-add to replace Makefile symlink -->
-        <remove-project path="build"                    name="OP-TEE/build.git" revision="refs/tags/3.19.0" clone-depth="1">
+        <remove-project path="build"                    name="OP-TEE/build.git" />
         <project        path="build"                    name="OP-TEE/build.git" revision="refs/tags/3.19.0" clone-depth="1">
                 <linkfile src="fvp-psa-sp.mk" dest="build/Makefile" />
         </project>