refactor(stm32mp1): remove STM32MP_USE_STM32IMAGE

The code managing legacy boot (without FIP) that was under
STM32MP_USE_STM32IMAGE flag is remove.

Change-Id: I04452453ed84567b0de39e900594a81526562259
Signed-off-by: Yann Gautier <yann.gautier@st.com>
diff --git a/plat/st/stm32mp1/stm32mp1.S b/plat/st/stm32mp1/stm32mp1.S
index 85caa0a..aee4f0e 100644
--- a/plat/st/stm32mp1/stm32mp1.S
+++ b/plat/st/stm32mp1/stm32mp1.S
@@ -1,16 +1,9 @@
 /*
- * Copyright (c) 2016-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#if STM32MP_USE_STM32IMAGE
-#ifdef BL32_BIN_PATH
-.section .bl32_image
-.incbin BL32_BIN_PATH
-#endif
-#endif /* STM32MP_USE_STM32IMAGE */
-
 .section .bl2_image
 .incbin BL2_BIN_PATH