wear_ui: Remove dead/duplicate codes.

WearRecoveryUI::draw_progress_locked() has declaration only, where
the definition was deleted in commit
5e7cfb9af6.

WearRecoveryUI::ClearText() is a duplicates of
ScreenRecoveryUI::ClearText().

Test: Build swordfish recovery image. 'Run graphics test' and 'View
      recovery logs'.
Change-Id: Ib66955d1d496f04359b4d6487160218e8f954478

wear_ui.cpp

@@ -363,17 +363,6 @@ void WearRecoveryUI::ShowFile(const char* filename) {
   fclose(fp);
 }
 
-void WearRecoveryUI::ClearText() {
-  pthread_mutex_lock(&updateMutex);
-  text_col_ = 0;
-  text_row_ = 0;
-  text_top_ = 1;
-  for (size_t i = 0; i < text_rows_; ++i) {
-    memset(text_[i], 0, text_cols_ + 1);
-  }
-  pthread_mutex_unlock(&updateMutex);
-}
-
 void WearRecoveryUI::PrintOnScreenOnly(const char *fmt, ...) {
   va_list ap;
   va_start(ap, fmt);

wear_ui.h

@@ -75,10 +75,8 @@ class WearRecoveryUI : public ScreenRecoveryUI {
 
   void draw_background_locked() override;
   void draw_screen_locked() override;
-  void draw_progress_locked();
 
   void PutChar(char);
-  void ClearText();
 };
 
 #endif  // RECOVERY_WEAR_UI_H