refactor: remove unnecessary try-catch

lib/src/config.dart

@@ -22,21 +22,13 @@ class Config {
     libgit2.git_libgit2_init();
 
     if (path == null) {
-      try {
       _configPointer = bindings.openDefault().value;
-      } catch (e) {
-        rethrow;
-      }
     } else {
-      try {
       if (File(path!).existsSync()) {
         _configPointer = bindings.open(path!).value;
       } else {
         throw Exception('File not found');
       }
-      } catch (e) {
-        rethrow;
-      }
     }
   }
 
@@ -104,16 +96,11 @@ class Config {
 
   /// Returns the value of config [variable].
   String getValue(String variable) {
-    try {
     return bindings.getValue(_configPointer, variable);
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Sets the [value] of config [variable].
   void setValue(String variable, dynamic value) {
-    try {
     if (value.runtimeType == bool) {
       bindings.setBool(_configPointer, variable, value);
     } else if (value.runtimeType == int) {
@@ -121,9 +108,6 @@ class Config {
     } else {
       bindings.setString(_configPointer, variable, value);
     }
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Deletes [variable] from the config file with the highest level
@@ -131,11 +115,7 @@ class Config {
   ///
   /// Throws a [LibGit2Error] if error occured.
   void deleteEntry(String variable) {
-    try {
     bindings.deleteEntry(_configPointer, variable);
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Returns list of values for multivar [variable]

lib/src/oid.dart

@@ -17,11 +17,7 @@ class Oid {
   Oid.fromSHA(String sha) {
     libgit2.git_libgit2_init();
 
-    try {
     _oidPointer = bindings.fromSHA(sha);
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Initializes a new instance of [Oid] class from provided
@@ -39,13 +35,7 @@ class Oid {
   Pointer<git_oid> get pointer => _oidPointer;
 
   /// Returns hexadecimal SHA-1 string.
-  String get sha {
+  String get sha => bindings.toSHA(_oidPointer);
-    try {
-      return bindings.toSHA(_oidPointer);
-    } catch (e) {
-      rethrow;
-    }
-  }
 
   @override
   bool operator ==(other) {

lib/src/repository.dart

@@ -20,11 +20,7 @@ class Repository {
   Repository.open(String path) {
     libgit2.git_libgit2_init();
 
-    try {
     _repoPointer = bindings.open(path);
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Pointer to memory address for allocated repository object.
@@ -58,11 +54,7 @@ class Repository {
   ///
   /// Throws a [LibGit2Error] if error occured.
   void setNamespace(String? namespace) {
-    try {
     bindings.setNamespace(_repoPointer, namespace);
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Checks whether this repository is a bare repository or not.
@@ -82,11 +74,7 @@ class Repository {
   ///
   /// Throws a [LibGit2Error] if error occured.
   bool get isHeadDetached {
-    try {
     return bindings.isHeadDetached(_repoPointer);
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Creates a new reference.
@@ -186,11 +174,7 @@ class Repository {
   ///
   /// Throws a [LibGit2Error] if error occured.
   void setHead(String reference) {
-    try {
     bindings.setHead(_repoPointer, reference);
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Checks if the current branch is unborn.
@@ -200,11 +184,7 @@ class Repository {
   ///
   /// Throws a [LibGit2Error] if error occured.
   bool get isBranchUnborn {
-    try {
     return bindings.isBranchUnborn(_repoPointer);
-    } catch (e) {
-      rethrow;
-    }
   }
 
   /// Sets the identity to be used for writing reflogs.
@@ -235,13 +215,7 @@ class Repository {
   /// Don't forget to remove the file with [removeMessage] after you create the commit.
   ///
   /// Throws a [LibGit2Error] if error occured.
-  String get message {
+  String get message => bindings.message(_repoPointer);
-    try {
-      return bindings.message(_repoPointer);
-    } catch (e) {
-      rethrow;
-    }
-  }
 
   /// Removes git's prepared message.
   void removeMessage() => bindings.removeMessage(_repoPointer);
@@ -255,13 +229,7 @@ class Repository {
   /// merge, revert, cherry-pick, etc. For example: MERGE_HEAD, MERGE_MSG, etc.
   ///
   /// Throws a [LibGit2Error] if error occured.
-  void stateCleanup() {
+  void stateCleanup() => bindings.stateCleanup(_repoPointer);
-    try {
-      bindings.stateCleanup(_repoPointer);
-    } catch (e) {
-      rethrow;
-    }
-  }
 
   /// Returns the path of the working directory for this repository.
   ///