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/use_case/noise_reduction/src/MainLoop.cc b/source/use_case/noise_reduction/src/MainLoop.cc
index c6214e3..bcaff6d 100644
--- a/source/use_case/noise_reduction/src/MainLoop.cc
+++ b/source/use_case/noise_reduction/src/MainLoop.cc
@@ -98,7 +98,7 @@
 
         if (bUseMenu) {
             DisplayMenu();
-            menuOption = arm::app::ReadUserInputAsInt(platform);
+            menuOption = arm::app::ReadUserInputAsInt();
             printf("\n");
         }
         switch (menuOption) {
@@ -108,7 +108,7 @@
             case MENU_OPT_RUN_INF_CHOSEN: {
                 printf("    Enter the audio clip IFM index [0, %d]: ", NUMBER_OF_FILES-1);
                 fflush(stdout);
-                auto clipIndex = static_cast<uint32_t>(arm::app::ReadUserInputAsInt(platform));
+                auto clipIndex = static_cast<uint32_t>(arm::app::ReadUserInputAsInt());
                 SetAppCtxClipIdx(caseContext, clipIndex);
                 executionSuccessful = NoiseReductionHandler(caseContext, false);
                 break;
diff --git a/source/use_case/noise_reduction/src/UseCaseHandler.cc b/source/use_case/noise_reduction/src/UseCaseHandler.cc
index 792b460..acb8ba7 100644
--- a/source/use_case/noise_reduction/src/UseCaseHandler.cc
+++ b/source/use_case/noise_reduction/src/UseCaseHandler.cc
@@ -64,8 +64,6 @@
             pMemDumpBytesWritten = ctx.Get<size_t*>("MEM_DUMP_BYTE_WRITTEN");
         }
         std::reference_wrapper<size_t> memDumpBytesWritten = std::ref(*pMemDumpBytesWritten);
-
-        auto& platform = ctx.Get<hal_platform&>("platform");
         auto& profiler = ctx.Get<Profiler&>("profiler");
 
         /* Get model reference. */
@@ -106,7 +104,7 @@
             audioFileAccessorFunc = ctx.Get<std::function<const char*(const uint32_t)>>("featureFileNames");
         }
         do{
-            platform.data_psn->clear(COLOR_BLACK);
+            hal_lcd_clear(COLOR_BLACK);
 
             auto startDumpAddress = memDumpBaseAddr + memDumpBytesWritten;
             auto currentIndex = ctx.Get<uint32_t>("clipIndex");
@@ -158,7 +156,7 @@
                 std::string str_inf{"Running inference... "};
 
                 /* Display message on the LCD - inference running. */
-                platform.data_psn->present_data_text(
+                hal_lcd_display_text(
                             str_inf.c_str(), str_inf.size(),
                             dataPsnTxtInfStartX, dataPsnTxtInfStartY, false);
 
@@ -191,7 +189,7 @@
 
                 /* Erase. */
                 str_inf = std::string(str_inf.size(), ' ');
-                platform.data_psn->present_data_text(
+                hal_lcd_display_text(
                                 str_inf.c_str(), str_inf.size(),
                                 dataPsnTxtInfStartX, dataPsnTxtInfStartY, false);
 
@@ -218,14 +216,14 @@
             IncrementAppCtxClipIdx(ctx);
 
             std::string clearString{' '};
-            platform.data_psn->present_data_text(
+            hal_lcd_display_text(
                     clearString.c_str(), clearString.size(),
                     dataPsnTxtInfStartX, dataPsnTxtInfStartY, false);
 
             std::string completeMsg{"Inference complete!"};
 
             /* Display message on the LCD - inference complete. */
-            platform.data_psn->present_data_text(
+            hal_lcd_display_text(
                     completeMsg.c_str(), completeMsg.size(),
                     dataPsnTxtInfStartX, dataPsnTxtInfStartY, false);