Revert "feat(factors): add bollinger bands factor"

This reverts commit 19c1cd9.

Author: ayushkrtiwari

.coverage

@@ -14,3 +14,6 @@ Teach `VectorizedBacktest` to rebalance weekly or monthly via a `rebalance_freq`
 
 ### Definition of Done
 - Tests pass; daily default unchanged.
+
+
+

.github/Contributor_Guide/Contributing.md

@@ -16,3 +16,4 @@ Modify CLI backtest command to also save a Plotly HTML chart for PnL.
 - CLI still supports Matplotlib PNG; Plotly HTML added.
 
 
+

.github/Contributor_Guide/Project_Tour.md

@@ -1,24 +1,17 @@
+### Summary
+Describe the change and why it’s needed.
 
-## Description
-
-> Give a brief description of the pull request.
+### Changes
+- 
 
 ### Testing
-
 - [ ] `pytest` passes locally
 - [ ] Linting passes (`ruff`, `black`)
 
-## Semver Changes
-
-- [ ] Patch (bug fix, no new features)
-- [ ] Minor (new features, no breaking changes)
-- [ ] Major (breaking changes)
-
-## Issues
+### Screenshots (optional)
 
-> List any issues that this pull request closes.
+### Related Issues
+Fixes #
 
-## Checklist
 
-- [ ] I have read the [Contributing Guidelines](../Contributor_Guide/Contruting.md).