[BOLT] Remove unexisting targets from bolt dockerfile (llvm#122321)

`perf2bolt` and `llvm-boltdiff` are now not separate targets but just
symlinks to `llvm-bolt` created when you install `llvm-bolt` itself so
when you try to build it ninja reports there are no targets for both of
them

Author: dustdfg

bolt/utils/docker/Dockerfile

@@ -23,8 +23,7 @@ RUN mkdir build && \
       -DCMAKE_EXE_LINKER_FLAGS="-Wl,--push-state -Wl,-whole-archive -ljemalloc_pic -Wl,--pop-state -lpthread -lstdc++ -lm -ldl" \
       -DCMAKE_INSTALL_PREFIX=/home/bolt/install && \
     ninja check-bolt && \
-    ninja install-llvm-bolt install-perf2bolt install-merge-fdata \
-      install-llvm-boltdiff install-bolt_rt
+    ninja install-llvm-bolt install-merge-fdata install-bolt_rt
 
 FROM ubuntu:24.04