Revert "audio: libaudioamp: add hooks to open/close for amplifier init"

This reverts commit 5507a6b2fd06e0313df55f8c1bd46296e977f628.

Depends on an incomplete change device-side.

Change-Id: I6ac49669a8e81dacc44804e7dae11c0a8e3ee65d
diff --git a/alsa_sound/audio_hw_hal.cpp b/alsa_sound/audio_hw_hal.cpp
index 6b34090..c3d052b 100644
--- a/alsa_sound/audio_hw_hal.cpp
+++ b/alsa_sound/audio_hw_hal.cpp
@@ -792,11 +792,6 @@
                         reinterpret_cast<struct audio_hw_device *>(device);
     struct qcom_audio_device *qadev = to_ladev(hwdev);
 
-#ifdef USES_AUDIO_AMPLIFIER
-    if (amplifier_close() != 0)
-        ALOGE("Amplifier close failed");
-#endif
-
     if (!qadev)
         return 0;
 
@@ -853,11 +848,6 @@
 
     *device = &qadev->device.common;
 
-#ifdef USES_AUDIO_AMPLIFIER
-    if (amplifier_open() != 0)
-        ALOGE("Amplifier initialization failed");
-#endif
-
     return 0;
 
 err_create_audio_hw: