remove autobrew path in configure

r/configure

@@ -65,8 +65,6 @@ PKG_TEST_HEADER="<arrow/api.h>"
 # Some env vars that control the build (all logical, case insensitive)
 # Development mode, also increases verbosity in the bundled build
 ARROW_R_DEV=`echo $ARROW_R_DEV | tr '[:upper:]' '[:lower:]'`
-# autobrew is how mac binaries are built on CRAN; FORCE ensures we use it here
-FORCE_AUTOBREW=`echo $FORCE_AUTOBREW | tr '[:upper:]' '[:lower:]'`
 # The bundled build compiles arrow C++ from source; FORCE ensures we don't pick up
 # any other packages that may be found on the system
 FORCE_BUNDLED_BUILD=`echo $FORCE_BUNDLED_BUILD | tr '[:upper:]' '[:lower:]'`
@@ -141,19 +139,11 @@ fi
 find_or_build_libarrow () {
   if [ "$FORCE_BUNDLED_BUILD" = "true" ]; then
     do_bundled_build
-  elif [ "$FORCE_AUTOBREW" = "true" ]; then
-    do_autobrew
   else
     find_arrow
     if [ "$_LIBARROW_FOUND" = "false" ]; then
       # If we haven't found a suitable version of libarrow, build it
-      if [ "$UNAME" = "Darwin" ] && ! echo $VERSION | grep -q "000"; then
-        # Only autobrew on release version (for testing, use FORCE_AUTOBREW above)
-        # (dev versions end in .9000, and nightly gets something like .10000xxx)
-        do_autobrew
-      else
-        do_bundled_build
-      fi
+      do_bundled_build
     fi
   fi
 }
@@ -175,12 +165,6 @@ find_arrow () {
     # 2. Use pkg-config to find arrow on the system
     _LIBARROW_FOUND="`${PKG_CONFIG} --variable=prefix --silence-errors ${PKG_CONFIG_NAME}`"
     echo "*** Trying Arrow C++ found by pkg-config: $_LIBARROW_FOUND"
-  elif brew --prefix ${PKG_BREW_NAME} > /dev/null 2>&1; then
-    # 3. On macOS, look for Homebrew apache-arrow
-    #    (note that if you have pkg-config, homebrew arrow may have already been found)
-    _LIBARROW_FOUND=`brew --prefix ${PKG_BREW_NAME}`
-    echo "*** Trying Arrow C++ found by Homebrew: ${_LIBARROW_FOUND}"
-    export PKG_CONFIG_PATH="${_LIBARROW_FOUND}/lib/pkgconfig${PKG_CONFIG_PATH:+:${PKG_CONFIG_PATH}}"
   else
     _LIBARROW_FOUND="false"
   fi
@@ -247,34 +231,6 @@ do_bundled_build () {
   fi
 }
 
-do_autobrew () {
-  echo "*** Downloading ${PKG_BREW_NAME}"
-
-  # Setup for local autobrew testing
-  if [ -f "tools/apache-arrow.rb" ]; then
-    # If you want to use a local apache-arrow.rb formula, do
-    # $ cp ../dev/tasks/homebrew-formulae/autobrew/apache-arrow*.rb tools
-    # before R CMD build or INSTALL (assuming a local checkout of the apache/arrow repository).
-    # If you have this, you should use the local autobrew script so they match.
-    cp tools/autobrew .
-  fi
-
-  if [ -f "autobrew" ]; then
-    echo "**** Using local manifest for ${PKG_BREW_NAME}"
-  else
-    if ! curl -sfL "https://autobrew.github.io/scripts/$PKG_BREW_NAME" > autobrew; then
-      echo "Failed to download manifest for ${PKG_BREW_NAME}"
-      # Fall back to the local copy
-      cp tools/autobrew .
-    fi
-  fi
-  if ! . autobrew; then
-    echo "Failed to retrieve binary for ${PKG_BREW_NAME}"
-  fi
-  # autobrew sets `PKG_LIBS`, `PKG_DIRS`, and `PKG_CFLAGS`
-  # TODO: move PKG_LIBS and PKG_CFLAGS out of autobrew and use set_pkg_vars
-}
-
 # Once libarrow is obtained, this function sets `PKG_LIBS`, `PKG_DIRS`, and `PKG_CFLAGS`
 # either from pkg-config or by inferring things about the directory in $1
 set_pkg_vars () {