workspace: Remove all dependencies on protobuf (RobotLocomotion#12689)

In common/proto, remove deprecated MakeFileInputStreamOrThrow.

In vector_gen, remove support for the protobuf input format.

In install, remove CMake find module for Protobuf.

In workspace, remove libprotobuf.

In setup, remove Ubuntu deps on libprotobuf-dev and python3-protobuf.

While we're anyway modifying the setup scripts, also remove macOS's binary
setup cleanup step of un-installing dreal.

common/proto/BUILD.bazel

@@ -21,26 +21,10 @@ drake_cc_package_library(
     name = "proto",
     deps = [
         ":call_python",
-        ":protobuf",
         ":rpc_pipe_temp_directory",
     ],
 )
 
-drake_cc_library(
-    name = "protobuf",
-    srcs = ["protobuf.cc"],
-    hdrs = ["protobuf.h"],
-    deprecation = "To be removed from Drake on or after 2020-02-01, with no replacement.",  # noqa
-    tags = [
-        # Avoid 'build //...' yelling at us.
-        "manual",
-    ],
-    deps = [
-        "//common:essential",
-        "@libprotobuf",
-    ],
-)
-
 drake_cc_library(
     name = "call_python",
     srcs = ["call_python.cc"],
@@ -108,18 +92,6 @@ drake_py_unittest(
     tags = ["no_valgrind_tools"],
 )
 
-drake_cc_googletest(
-    name = "protobuf_test",
-    copts = ["-Wno-deprecated-declarations"],
-    data = [
-        "test/test_string.txt",
-    ],
-    deps = [
-        ":protobuf",
-        "//common",
-    ],
-)
-
 drake_cc_googletest(
     name = "rpc_pipe_temp_directory_test",
     deps = [

setup/mac/binary_distribution/Brewfile

@@ -18,7 +18,6 @@ brew 'lz4'
 brew 'nlopt'
 brew 'numpy'
 brew 'openblas'
-brew 'protobuf'
 brew 'pkg-config'
 brew 'python'
 brew 'scipy'

setup/mac/binary_distribution/install_prereqs.sh

@@ -19,9 +19,6 @@ if ! command -v /usr/local/bin/brew &>/dev/null; then
 fi
 
 /usr/local/bin/brew update
-# TODO(jamiesnape): Remove two lines uninstalling dreal on or after 2020-02-01.
-brew uninstall --force dreal
-brew untap dreal/dreal &>/dev/null || true
 /usr/local/bin/brew bundle --file="${BASH_SOURCE%/*}/Brewfile" --no-lock
 
 if ! command -v /usr/local/bin/pip3 &>/dev/null; then

setup/ubuntu/binary_distribution/packages-bionic.txt

@@ -21,7 +21,6 @@ libnetcdf13
 libnlopt0
 libogg0
 libpng16-16
-libprotobuf-dev
 libqt5multimedia5
 libqt5x11extras5
 libtbb2

setup/ubuntu/source_distribution/packages-bionic.txt

@@ -57,7 +57,6 @@ python3-lxml-dbg
 python3-matplotlib-dbg
 python3-numpy-dbg
 python3-pandas
-python3-protobuf
 python3-pydot
 python3-scipy-dbg
 python3-sphinx

tools/install/libdrake/BUILD.bazel

@@ -218,7 +218,6 @@ cc_library(
         "//common:drake_marker_shared_library",
         "@ignition_math",
         "@lcm",
-        "@libprotobuf",
         "@spdlog",
         "@tinyxml2",
         "@yaml_cpp",

tools/install/libdrake/drake.cps

@@ -35,10 +35,6 @@
       "Hints": ["@prefix@/lib/cmake/optitrack"],
       "X-CMake-Find-Args": ["CONFIG"]
     },
-    "Protobuf": {
-      "Version": "3.0",
-      "X-CMake-Find-Args": ["MODULE"]
-    },
     "robotlocomotion-lcmtypes": {
       "Hints": ["@prefix@/lib/cmake/robotlocomotion-lcmtypes"],
       "X-CMake-Find-Args": ["CONFIG"]
@@ -69,7 +65,6 @@
         "ignition-math6:ignition-math6",
         "lcm:lcm",
         "optitrack:optitrack-lcmtypes-cpp",
-        "protobuf:libprotobuf",
         "robotlocomotion-lcmtypes:robotlocomotion-lcmtypes-cpp",
         "spdlog:spdlog",
         "tinyxml2:tinyxml2",

tools/vector_gen/BUILD.bazel

@@ -23,20 +23,10 @@ load(
 )
 load("//tools/lint:lint.bzl", "add_lint_tests")
 
-# N.B. This library is DRAKE_DEPRECATED 2020-02-01 -- we've committed the
-# generated sources into git so that we can remove our protoc dependency.
-drake_py_library(
-    name = "named_vector",
-    srcs = ["named_vector_pb2.py"],
-    tags = ["nolint"],
-    visibility = ["//visibility:private"],
-)
-
 drake_py_binary(
     name = "lcm_vector_gen",
     srcs = ["lcm_vector_gen.py"],
     deps = [
-        ":named_vector",
         "//tools/lint:clang_format",
         "//tools/lint:find_data",
     ],