[sqlite] always use sqlite includes - also with cling

Old CINT was not able to parse them correctly

sql/sqlite/inc/TSQLiteResult.h

@@ -14,12 +14,7 @@
 
 #include "TSQLResult.h"
 
-#if !defined(__CINT__)
 #include <sqlite3.h>
-#else
-struct sqlite3_stmt;
-#endif
-
 
 class TSQLiteResult : public TSQLResult {
 

sql/sqlite/inc/TSQLiteRow.h

@@ -14,12 +14,12 @@
 
 #include "TSQLRow.h"
 
-struct sqlite3_stmt;
+#include <sqlite3.h>
 
 class TSQLiteRow : public TSQLRow {
 
 private:
-   sqlite3_stmt *fResult{nullptr};       // current result set
+   sqlite3_stmt *fResult{nullptr};       ///<! current result set
    Bool_t        IsValid(Int_t field);
 
 public:

sql/sqlite/inc/TSQLiteServer.h

@@ -14,11 +14,7 @@
 
 #include "TSQLServer.h"
 
-#if !defined(__CINT__)
 #include <sqlite3.h>
-#else
-struct sqlite3;
-#endif
 
 class TSQLiteServer : public TSQLServer {
 

sql/sqlite/inc/TSQLiteStatement.h

@@ -21,7 +21,6 @@ struct SQLite3_Stmt_t {
    sqlite3_stmt *fRes;
 };
 
-
 class TSQLiteStatement : public TSQLStatement {
 
 private: