Delete 13-solution-issue.md

.github/ISSUE_TEMPLATE/13-solution-issue.md

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-name: "Solution (legacy) Issue"
-about: Use this template for assistance with a specific Mediapipe solution (google.github.io/mediapipe/solutions) such as "Pose", including inference model usage/training, solution-specific calculators etc.
-labels: type:support
-
----
-<em>Please make sure that this is a [solution](https://google.github.io/mediapipe/solutions/solutions.html) issue.<em>
-
-**System information** (Please provide as much relevant information as possible)
-- Have I written custom code (as opposed to using a stock example script provided in Mediapipe):
-- OS Platform and Distribution (e.g., Linux Ubuntu 16.04, Android 11, iOS 14.4):
-- [MediaPipe version](https://github.com/google/mediapipe/releases):
-- Bazel version:
-- Solution (e.g. FaceMesh, Pose, Holistic):
-- Programming Language and version ( e.g. C++, Python, Java):
-
-**Describe the expected behavior:**
-
-**Standalone code you may have used to try to get what you need :**
-
-If there is a problem, provide a reproducible test case that is the bare minimum necessary to generate the problem. If possible, please share a link to Colab/repo link /any notebook:
-
-**Other info / Complete Logs :**
-Include any logs or source code that would be helpful to
-diagnose the problem. If including tracebacks, please include the full
-traceback. Large logs and files should be attached: