Reverted configurations.

This patch reverts configuration entries introduced
by the following patches:

-Enabled ARMCLANG
 Change-Id: Ifedcb9f3d1fa209269b7f5fd5e148471b15f4f8e
-Enabled AN519 in LAVA
 Change-Id: I325b4ee58c8f5950657a609fdd0c2ccd31150d4a

Change-Id: I78186db7843b0f60134f0aca5760979d6e113d56
Signed-off-by: Minos Galanakis <minos.galanakis@linaro.org>
diff --git a/build_helper/build_helper_configs.py b/build_helper/build_helper_configs.py
index 5c72a56..e48abeb 100644
--- a/build_helper/build_helper_configs.py
+++ b/build_helper/build_helper_configs.py
@@ -108,7 +108,7 @@
 # Configure build manager to build several combinations
 config_AN521 = {"seed_params": {
                 "target_platform": ["AN521"],
-                "compiler": ["ARMCLANG", "GNUARM"],
+                "compiler": ["GNUARM"],
                 "proj_config": ["ConfigRegression",
                                 "ConfigCoreIPC",
                                 "ConfigCoreIPCTfmLevel2",
@@ -127,7 +127,7 @@
 # Configure build manager to build several combinations
 config_AN519 = {"seed_params": {
                 "target_platform": ["AN519"],
-                "compiler": ["ARMCLANG", "GNUARM"],
+                "compiler": ["GNUARM"],
                 "proj_config": ["ConfigRegression",
                                 "ConfigCoreIPC",
                                 "ConfigCoreIPCTfmLevel2",
@@ -178,7 +178,7 @@
 
 config_MUSCA_A = {"seed_params": {
                   "target_platform": ["MUSCA_A"],
-                  "compiler": ["ARMCLANG", "GNUARM"],
+                  "compiler": ["GNUARM"],
                   "proj_config": ["ConfigRegression",
                                   "ConfigCoreIPC",
                                   "ConfigCoreIPCTfmLevel2",
@@ -195,7 +195,7 @@
 
 config_MUSCA_B1 = {"seed_params": {
                    "target_platform": ["MUSCA_B1"],
-                   "compiler": ["ARMCLANG", "GNUARM"],
+                   "compiler": ["GNUARM"],
                    "proj_config": ["ConfigRegression",
                                    "ConfigCoreIPC",
                                    "ConfigCoreIPCTfmLevel2",