fix: remove workaround for Buffer.store_to_file_const bug on non-linux platforms

This bug was fixed in the previous commit.

src/buffer/Buffer.zig

@@ -933,10 +933,10 @@ const Node = union(enum) {
                 try node.right.store(writer, eol_mode);
             },
             .leaf => |*leaf| {
-                _ = try writer.write(leaf.buf);
+                try writer.writeAll(leaf.buf);
                 if (leaf.eol) switch (eol_mode) {
-                    .lf => _ = try writer.write("\n"),
-                    .crlf => _ = try writer.write("\r\n"),
+                    .lf => try writer.writeByte('\n'),
+                    .crlf => try writer.writeAll("\r\n"),
                 };
             },
         }
@@ -1374,17 +1374,7 @@ pub fn store_to_string(self: *const Self, allocator: Allocator, eol_mode: EolMod
 }
 
 fn store_to_file_const(self: *const Self, writer: *std.Io.Writer) StoreToFileError!void {
-    switch (builtin.os.tag) {
-        .linux => {
     try self.root.store(writer, self.file_eol_mode);
-        },
-        else => {
-            var content: std.Io.Writer.Allocating = .init(self.external_allocator);
-            defer content.deinit();
-            try self.root.store(&content.writer, self.file_eol_mode);
-            try writer.writeAll(content.written());
-        },
-    }
     try writer.flush();
 }