Clean up unnecessary comments and references

- Remove vague TODO comment, clarify legacy SHA256 support purpose
- Make CONTRIBUTING.md more generic (not GitHub-specific)
- Remove Git from prerequisites (only needed if cloning)

CONTRIBUTING.md

@@ -70,4 +70,4 @@ Requires `pandoc` or `go-md2man` to be installed.
 
 ## Questions?
 
-Feel free to open an issue for questions or discussions.
+Feel free to open an issue or start a discussion in the repository.

README.md

@@ -20,7 +20,6 @@ A modern password manager using AGE encryption.
 
 - **Go 1.21 or later** - Required for building
 - **Linux/Unix system** - Designed for Unix-like operating systems
-- **Git** - For cloning the repository
 - **pandoc** or **go-md2man** (optional) - For building manpages
 - **xclip** or **wl-clipboard** - For clipboard support (X11/Wayland)
 

store.go

@@ -171,7 +171,7 @@ func verifyMasterPassword(storeDir string, password []byte) (bool, error) {
 }
 
 // verifyLegacySHA256 verifies against old SHA256 hashes (for migration)
-// TODO: Maybe remove this eventually? But backwards compat is nice...
+// Kept for backwards compatibility with stores created before Argon2id migration
 func verifyLegacySHA256(password []byte, storedHash string) (bool, error) {
 	// Old stores used SHA256 - not ideal but we support it for migration
 	hash := sha256Sum(password)