Remove redirection into command. There are some design questions arou…

…nd how this should work because it should probably get the current pipes of where it gets injected into the shell and then there's also the question of if it should get the current env.

mod.test.ts

@@ -1229,14 +1229,6 @@ Deno.test("output redirect with writable", async () => {
   }
 });
 
-Deno.test("input redirection to command", async () => {
-  {
-    const echos = $`echo 1 && echo 2`;
-    const text = await $`cat - < ${echos}`.text();
-    assertEquals(text, "1\n2");
-  }
-});
-
 Deno.test("shebang support", async (t) => {
   await withTempDir(async (dir) => {
     const steps: Promise<boolean>[] = [];

src/command.ts

@@ -183,10 +183,6 @@ export class CommandBuilder implements PromiseLike<CommandResult> {
     return builder;
   }
 
-  [symbols.readable](): ReadableStream<Uint8Array> {
-    return this.stdout("piped").spawn().stdout();
-  }
-
   then<TResult1 = CommandResult, TResult2 = never>(
     onfulfilled?: ((value: CommandResult) => TResult1 | PromiseLike<TResult1>) | null | undefined,
     onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined,