Remove unused parameters from target_link_libraries tests.

Tests/CMakeCommands/target_link_libraries/targetA.cpp

@@ -5,7 +5,7 @@
 
 #include "subdirlib.h"
 
-int main(int argc, char **argv)
+int main(int, char **)
 {
   DepA a;
   DepB b;

Tests/CMakeCommands/target_link_libraries/targetB.cpp

@@ -1,7 +1,7 @@
 
 #include "depD.h"
 
-int main(int argc, char **argv)
+int main(int, char **)
 {
   DepD d;
   DepA a = d.getA();

Tests/CMakeCommands/target_link_libraries/targetC.cpp

@@ -8,7 +8,7 @@
 #error Expected TEST_DEF definition
 #endif
 
-int main(int argc, char **argv)
+int main(int, char **)
 {
   DepG g;