rustc_target: Do not specify some target options redundantly

These values are already inherited

Author: petrochenkov

compiler/rustc_target/src/spec/aarch64_nintendo_switch_freestanding.rs

@@ -18,7 +18,6 @@ pub fn target() -> Target {
             panic_strategy: PanicStrategy::Abort,
             position_independent_executables: true,
             dynamic_linking: true,
-            executables: true,
             relro_level: RelroLevel::Off,
             ..Default::default()
         },

compiler/rustc_target/src/spec/android_base.rs

@@ -4,7 +4,6 @@ pub fn opts() -> TargetOptions {
     let mut base = super::linux_base::opts();
     base.os = "android".into();
     base.default_dwarf_version = 2;
-    base.position_independent_executables = true;
     base.has_thread_local = false;
     // This is for backward compatibility, see https://github.com/rust-lang/rust/issues/49867
     // for context. (At that time, there was no `-C force-unwind-tables`, so the only solution

compiler/rustc_target/src/spec/hexagon_unknown_linux_musl.rs

@@ -10,7 +10,6 @@ pub fn target() -> Target {
     base.crt_static_default = false;
     base.has_rpath = true;
     base.linker_is_gnu = false;
-    base.dynamic_linking = true;
 
     base.c_enum_min_bits = 8;
 

compiler/rustc_target/src/spec/powerpc_unknown_freebsd.rs

@@ -1,5 +1,5 @@
 use crate::abi::Endian;
-use crate::spec::{LinkerFlavor, RelocModel, Target, TargetOptions};
+use crate::spec::{LinkerFlavor, Target, TargetOptions};
 
 pub fn target() -> Target {
     let mut base = super::freebsd_base::opts();
@@ -15,7 +15,6 @@ pub fn target() -> Target {
         options: TargetOptions {
             endian: Endian::Big,
             features: "+secure-plt".into(),
-            relocation_model: RelocModel::Pic,
             mcount: "_mcount".into(),
             ..base
         },

compiler/rustc_target/src/spec/x86_64_unknown_l4re_uclibc.rs

@@ -4,8 +4,6 @@ pub fn target() -> Target {
     let mut base = super::l4re_base::opts();
     base.cpu = "x86-64".into();
     base.max_atomic_width = Some(64);
-    base.crt_static_allows_dylibs = false;
-    base.dynamic_linking = false;
     base.panic_strategy = PanicStrategy::Abort;
 
     Target {

compiler/rustc_target/src/spec/x86_64_unknown_none.rs

@@ -4,10 +4,8 @@
 // `target-cpu` compiler flags to opt-in more hardware-specific
 // features.
 
-use super::{
-    CodeModel, LinkerFlavor, LldFlavor, PanicStrategy, RelocModel, RelroLevel, StackProbeType,
-    Target, TargetOptions,
-};
+use super::{CodeModel, LinkerFlavor, LldFlavor, PanicStrategy};
+use super::{RelroLevel, StackProbeType, Target, TargetOptions};
 
 pub fn target() -> Target {
     let opts = TargetOptions {
@@ -18,7 +16,6 @@ pub fn target() -> Target {
         position_independent_executables: true,
         static_position_independent_executables: true,
         relro_level: RelroLevel::Full,
-        relocation_model: RelocModel::Pic,
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
         linker: Some("rust-lld".into()),
         features: