Removed extrae submodule

Author: mvidalpinol

.gitmodules

@@ -13,9 +13,6 @@
 [submodule "ait"]
 	path = ait
 	url = ../ait.git
-[submodule "extrae"]
-	path = extrae
-	url = ../extrae.git
 [submodule "ompss-at-fpga-kernel-module"]
 	path = ompss-at-fpga-kernel-module
 	url = ../ompss-at-fpga-kernel-module.git