[C#] Remove superfluous semicolon in C# structs (#6791)

Aims to resolve #6788

-Remove superfluous semicolon in C# structs

tests/MyGame/Example/Ability.cs

@@ -43,7 +43,7 @@ public struct Ability : IFlatbufferObject
       _o.Id,
       _o.Distance);
   }
-};
+}
 
 public class AbilityT
 {

tests/MyGame/Example/ArrayStruct.cs

@@ -97,7 +97,7 @@ public struct ArrayStruct : IFlatbufferObject
       _o.E,
       _f);
   }
-};
+}
 
 public class ArrayStructT
 {

tests/MyGame/Example/ArrayTable.cs

@@ -44,7 +44,7 @@ public struct ArrayTable : IFlatbufferObject
     AddA(builder, MyGame.Example.ArrayStruct.Pack(builder, _o.A));
     return EndArrayTable(builder);
   }
-};
+}
 
 public class ArrayTableT
 {

tests/MyGame/Example/Monster.cs

@@ -741,7 +741,7 @@ public struct Monster : IFlatbufferObject
       _testrequirednestedflatbuffer,
       _scalar_key_sorted_tables);
   }
-};
+}
 
 public class MonsterT
 {

tests/MyGame/Example/NestedStruct.cs

@@ -66,7 +66,7 @@ public struct NestedStruct : IFlatbufferObject
       _c,
       _d);
   }
-};
+}
 
 public class NestedStructT
 {

tests/MyGame/Example/Referrable.cs

@@ -74,7 +74,7 @@ public struct Referrable : IFlatbufferObject
       builder,
       _o.Id);
   }
-};
+}
 
 public class ReferrableT
 {

tests/MyGame/Example/Stat.cs

@@ -94,7 +94,7 @@ public struct Stat : IFlatbufferObject
       _o.Val,
       _o.Count);
   }
-};
+}
 
 public class StatT
 {

tests/MyGame/Example/StructOfStructs.cs

@@ -61,7 +61,7 @@ public struct StructOfStructs : IFlatbufferObject
       _c_id,
       _c_distance);
   }
-};
+}
 
 public class StructOfStructsT
 {

tests/MyGame/Example/Test.cs

@@ -44,7 +44,7 @@ public struct Test : IFlatbufferObject
       _o.A,
       _o.B);
   }
-};
+}
 
 public class TestT
 {

tests/MyGame/Example/TestSimpleTableWithEnum.cs

@@ -49,7 +49,7 @@ internal partial struct TestSimpleTableWithEnum : IFlatbufferObject
       builder,
       _o.Color);
   }
-};
+}
 
 internal partial class TestSimpleTableWithEnumT
 {

tests/MyGame/Example/TypeAliases.cs

@@ -158,7 +158,7 @@ public struct TypeAliases : IFlatbufferObject
       _v8,
       _vf64);
   }
-};
+}
 
 public class TypeAliasesT
 {

tests/MyGame/Example/Vec3.cs

@@ -71,7 +71,7 @@ public struct Vec3 : IFlatbufferObject
       _test3_a,
       _test3_b);
   }
-};
+}
 
 public class Vec3T
 {