Remove Makefiles (have been deprecated a while)

.github/workflows/c.yml

@@ -52,17 +52,6 @@ jobs:
       - uses: ./.github/actions/install-ubuntu
       - uses: ./.github/actions/build
 
-  ubuntu22-make:
-    runs-on: ubuntu-22.04
-    env:
-      CC: gcc
-      CXX: g++
-      CXXFLAGS: -Werror -Wall -pedantic
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/actions/install-ubuntu
-      - run: make -C osmpbf
-
   macos:
     runs-on: macos-latest
     env:

README.md

@@ -3,7 +3,7 @@
 
 https://github.com/openstreetmap/OSM-binary
 
-Osmpbf is a Java/C library to read and write OpenStreetMap PBF files.
+Osmpbf is a Java/C++ library to read and write OpenStreetMap PBF files.
 PBF (Protocol buffer Binary Format) is a binary file format for OpenStreetMap
 data that uses Google Protocol Buffers as low-level storage.
 
@@ -55,9 +55,6 @@ This build is also used for Debian packaging.
 
 ## C++ Version
 
-(Earlier versions used Makefiles for building. Please switch to the CMake-based
-build, the Makefiles are deprecated and will be removed in a future version.)
-
 To compile:
 
 ```sh