Revert "[libc] printf, putchar and vprintf in bareemetal entrypoints (#95436)"

This reverts commit b1de42a, which
breaks libc build for baremetal targets.

Author: zeroomega

libc/config/baremetal/arm/entrypoints.txt

@@ -80,11 +80,8 @@ set(TARGET_LIBC_ENTRYPOINTS
 
     # stdio.h entrypoints
     libc.src.stdio.remove
-    libc.src.stdio.printf
-    libc.src.stdio.putchar
     libc.src.stdio.sprintf
     libc.src.stdio.snprintf
-    libc.src.stdio.vprintf
     libc.src.stdio.vsprintf
     libc.src.stdio.vsnprintf
 

libc/config/baremetal/riscv/entrypoints.txt

@@ -80,11 +80,8 @@ set(TARGET_LIBC_ENTRYPOINTS
 
     # stdio.h entrypoints
     libc.src.stdio.remove
-    libc.src.stdio.printf
-    libc.src.stdio.putchar
     libc.src.stdio.sprintf
     libc.src.stdio.snprintf
-    libc.src.stdio.vprintf
     libc.src.stdio.vsprintf
     libc.src.stdio.vsnprintf