remove mise.toml file

DEVELOPMENT.md

@@ -5,6 +5,16 @@
     sudo zypper in libxml2-devel libxslt-devel libmariadb-devel sqlite3-devel gcc libyaml-devel libffi-devel
     ```
 2. Install the ruby version specified in the `.ruby-version` [file](.ruby-version).
+
+   2.1 Mise
+
+   if you are using mise and you want mise to use the same version of .ruby-version,
+   point mise to read that file with the following command:
+   ```
+   mise settings add idiomatic_version_file_enable_tools ruby
+   ```
+   see [here](https://mise.jdx.dev/lang/ruby.html#ruby-version-and-gemfile-support)
+
 3. Install and setup the database:
 
    **Default: MariaDB or MySQL server**
@@ -138,4 +148,4 @@ CI images are built on [Open build service](https://build.opensuse.org). We have
 #!BuildTag: rmt-ci-container
 #!UseOBSRepositories
 ```
-indicating the image tag and enforcing local-only build (running `zypper ar` will not work). There's also the special `_multibuild` config that allows multiple images targeting different build platforms for RMT. Currently, we build rmt images for ruby 2.5 and ruby 3.2 (experimental). The project is configured to use tumbleweed and sles/leap(15.5). In the future, we aim to use leap only for legacy (RMT 2.x) builds.
+indicating the image tag and enforcing local-only build (running `zypper ar` will not work). There's also the special `_multibuild` config that allows multiple images targeting different build platforms for RMT. Currently, we build rmt images for ruby 2.5 and ruby 3.2 (experimental). The project is configured to use tumbleweed and sles/leap(15.5). In the future, we aim to use leap only for legacy (RMT 2.x) builds.