Remove now deprecated target x86_64-sun-solaris.

Author: psumbera

compiler/rustc_target/src/spec/mod.rs

@@ -1587,7 +1587,6 @@ supported_targets! {
     ("armv7r-none-eabihf", armv7r_none_eabihf),
 
     ("x86_64-pc-solaris", x86_64_pc_solaris),
-    ("x86_64-sun-solaris", x86_64_sun_solaris),
     ("sparcv9-sun-solaris", sparcv9_sun_solaris),
 
     ("x86_64-unknown-illumos", x86_64_unknown_illumos),

src/tools/build-manifest/src/main.rs

@@ -151,7 +151,6 @@ static TARGETS: &[&str] = &[
     "x86_64-linux-android",
     "x86_64-pc-windows-gnu",
     "x86_64-pc-windows-msvc",
-    "x86_64-sun-solaris",
     "x86_64-pc-solaris",
     "x86_64-unikraft-linux-musl",
     "x86_64-unknown-freebsd",