MLECO-3096: Removing data_acq and data_psn

Further to the HAL refactoring done in previous commits,
this CR simpifies HAL by removing data_acq and data_psn
"modules". The associated function pointers have been
removed.

Change-Id: I04c194c08dfe0aff98ce4e0f0f056bac254c137d
Signed-off-by: Kshitij Sisodia <kshitij.sisodia@arm.com>
diff --git a/source/application/main/Main.cc b/source/application/main/Main.cc
index 8ed9c5a..e27d5b5 100644
--- a/source/application/main/Main.cc
+++ b/source/application/main/Main.cc
@@ -42,12 +42,10 @@
 int main ()
 {
     hal_platform    platform;
-    data_acq_module dataAcq;
-    data_psn_module dataPsn;
     platform_timer  timer;
 
     /* Initialise the HAL and platform. */
-    hal_init(&platform, &dataAcq, &dataPsn, &timer);
+    hal_init(&platform, &timer);
 
     if (0 == hal_platform_init(&platform)) {
         /* Application information, UART should have been initialised. */