removes unused build components

env/iss/CMakeLists.txt

@@ -1,30 +0,0 @@
-#cmake_minimum_required(VERSION 3.12)
-project(iss)
-message(STATUS " here in iss")
-
-# Create library for ISS board support
-add_library(board_iss STATIC
-    init.c
-    write.c
-)
-
-# Include directories
-target_include_directories(board_iss PUBLIC
-    ${BSP_BASE}/include
-    ${BSP_BASE}/env
-    ${CMAKE_CURRENT_SOURCE_DIR}
-)
-
-# Set compile options
-target_compile_options(board_iss PRIVATE
-    -march=${RISCV_ARCH}_zicsr_zifencei
-    -mabi=${RISCV_ABI}
-    -mcmodel=medany
-    -ffunction-sections
-    -fdata-sections
-)
-
-# Add compile definitions
-target_compile_definitions(board_iss PRIVATE
-    BOARD_${BOARD}
-)