remove old deprecated commands (#9840)

# Description
in this PR i propose to remove the following old deprecated commands
- `hash base64` -> `encode base64`
- `math eval` -> `math <sub>`
- `str to-datetime` -> `into datetime`
- `str to-decimal` -> `into decimal`
- `str find-replace` -> `str replace`
- `str to-int` -> `into int`
- `keep` -> `take`
- `match` -> `find`
- `nth` -> `select`
- `pivot` -> `transpose`
- `unalias` -> `hide`
- `all?` -> `all`
- `any?` -> `any`
- `empty?` -> `is-empty`
- `build-string` -> `str join` / string concatenation with `+`
- `str lpad` -> `fill`
- `str rpad` -> `fill`
- `str collect` -> `str join`
- `old-alias` -> `alias`

so old i do not remember them at all 😮

i left the following four commands because they have been moved much
more recently i think!
- `fetch` -> `http get`
- `post` -> `http post`
- `benchmark` -> `timeit`
- `let-env`
- `date format` -> `format date`

# User-Facing Changes

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- ⚫ `toolkit test`
- ⚫ `toolkit test stdlib`

# After Submitting

crates/nu-command/src/default_context.rs

@@ -299,8 +299,6 @@ pub fn add_shell_command_context(mut engine_state: EngineState) -> EngineState {
 
         // Env
         bind_command! {
-            LetEnvDeprecated,
-            DateFormat,
             ExportEnv,
             LoadEnv,
             SourceEnv,
@@ -382,15 +380,8 @@ pub fn add_shell_command_context(mut engine_state: EngineState) -> EngineState {
 
         // Deprecated
         bind_command! {
-            HashBase64,
-            LPadDeprecated,
-            MathEvalDeprecated,
-            RPadDeprecated,
-            StrCollectDeprecated,
-            StrDatetimeDeprecated,
-            StrDecimalDeprecated,
-            StrFindReplaceDeprecated,
-            StrIntDeprecated,
+            LetEnv,
+            DateFormat,
         };
 
         working_set.render()

crates/nu-command/src/deprecated/deprecated_commands.rs

@@ -6,25 +6,9 @@ use std::collections::HashMap;
 /// For those, it's currently easiest to have a "stub" command that just returns an error.
 pub fn deprecated_commands() -> HashMap<String, String> {
     [
-        ("keep".to_string(), "take".to_string()),
-        ("match".to_string(), "find".to_string()),
-        ("nth".to_string(), "select".to_string()),
-        ("pivot".to_string(), "transpose".to_string()),
-        ("unalias".to_string(), "hide".to_string()),
-        ("all?".to_string(), "all".to_string()),
-        ("any?".to_string(), "any".to_string()),
-        ("empty?".to_string(), "is-empty".to_string()),
-        (
-            "build-string".to_string(),
-            "str join'/'string concatenation with '+'".to_string(),
-        ),
         ("fetch".to_string(), "http get".to_string()),
         ("post".to_string(), "http post".to_string()),
-        ("str lpad".to_string(), "fill".to_string()),
-        ("str rpad".to_string(), "fill".to_string()),
         ("benchmark".to_string(), "timeit".to_string()),
-        ("str collect".to_string(), "str join".to_string()),
-        ("old-alias".to_string(), "alias".to_string()),
     ]
     .into_iter()
     .collect()

crates/nu-command/src/deprecated/let_env.rs

@@ -3,9 +3,9 @@ use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, PipelineData, ShellError, Signature, SyntaxShape, Type};
 
 #[derive(Clone)]
-pub struct LetEnvDeprecated;
+pub struct LetEnv;
 
-impl Command for LetEnvDeprecated {
+impl Command for LetEnv {
     fn name(&self) -> &str {
         "let-env"
     }

crates/nu-command/src/deprecated/mod.rs

@@ -1,25 +1,7 @@
-mod collect;
 mod deprecated_commands;
 mod format;
-mod hash_base64;
 mod let_env;
-mod lpad;
-mod math_eval;
-mod rpad;
-mod str_datetime;
-mod str_decimal;
-mod str_find_replace;
-mod str_int;
 
-pub use collect::StrCollectDeprecated;
 pub use deprecated_commands::*;
 pub use format::SubCommand as DateFormat;
-pub use hash_base64::HashBase64;
-pub use let_env::LetEnvDeprecated;
-pub use lpad::LPadDeprecated;
-pub use math_eval::SubCommand as MathEvalDeprecated;
-pub use rpad::RPadDeprecated;
-pub use str_datetime::StrDatetimeDeprecated;
-pub use str_decimal::StrDecimalDeprecated;
-pub use str_find_replace::StrFindReplaceDeprecated;
-pub use str_int::StrIntDeprecated;
+pub use let_env::LetEnv;