BOSTON — Gov. Charlie Baker on Friday signed into law a $47.6 billion state budget for this fiscal year, striking $7.9 million in spending from the bill lawmakers sent him a week ago and also vetoing a section that further delays implementation of a charitable giving tax deduction approved by voters in 2000. In a message to legislators, Baker said the bill grows spending by about 3.6% over last year, excluding certain fund transfers. The final budget contains $2.9 billion more than the spending plan Baker filed in January, but is also based on significantly higher tax collection estimates than were in place over the winter.