[CI] Fix bug in lvgl 32b docker image (again)

Signed-off-by: Jean-Pierre Miceli <jean-pierre.miceli@heig-vd.ch>

Author: jmi-reds

docker/Dockerfile.lvperf_32b

@@ -4,7 +4,7 @@ FROM baseimage AS builder
 
 RUN apt update && \
     apt install -y build-essential cmake qemu-system-arm gcc-arm-none-eabi \
-    bison flex libssl-dev device-tree-compiler qemu-system-arm g++-arm-none-eabi && \
+    bison flex libssl-dev device-tree-compiler qemu-system-arm && \
     apt clean && \
     rm -rf /var/lib/apt/lists/*