Remove testing_only_libclang_4 and expectations

Author: kulp

Cargo.toml

@@ -85,4 +85,3 @@ testing_only_docs = []
 testing_only_extra_assertions = []
 testing_only_libclang_9 = []
 testing_only_libclang_5 = []
-testing_only_libclang_4 = []

appveyor.yml

@@ -2,18 +2,12 @@ environment:
   RUST_BACKTRACE: 1
   RUST_CHANNEL: "%Configuration%"
   matrix:
-  - TARGET: gnu
-    LLVM_VERSION: 4.0.0-1
-    BINDGEN_FEATURES: testing_only_libclang_4
   - TARGET: gnu
     LLVM_VERSION: 5.0.0-1
     BINDGEN_FEATURES: testing_only_libclang_5
   - TARGET: gnu
     LLVM_VERSION: 9.0.0-1
     BINDGEN_FEATURES: testing_only_libclang_9
-  - TARGET: msvc
-    LLVM_VERSION: 4.0.0
-    BINDGEN_FEATURES: testing_only_libclang_4
   - TARGET: msvc
     LLVM_VERSION: 5.0.0
     BINDGEN_FEATURES: testing_only_libclang_5

bindgen-integration/Cargo.toml

@@ -13,4 +13,3 @@ cc = "1.0"
 [features]
 testing_only_libclang_9 = ["bindgen/testing_only_libclang_9"]
 testing_only_libclang_5 = ["bindgen/testing_only_libclang_5"]
-testing_only_libclang_4 = ["bindgen/testing_only_libclang_4"]

src/main.rs

@@ -23,8 +23,6 @@ fn clang_version_check() {
         Some((9, 0))
     } else if cfg!(feature = "testing_only_libclang_5") {
         Some((5, 0))
-    } else if cfg!(feature = "testing_only_libclang_4") {
-        Some((4, 0))
     } else {
         None
     };

tests/expectations/build.rs

@@ -9,7 +9,6 @@ use std::io::Write;
 use std::path::Path;
 
 const LIBCLANG_VERSION_DIRS: &'static [&'static str] = &[
-    "libclang-4",
     "libclang-5",
     "libclang-9",
 ];