PARIS — After almost 18 months of relying on expensive emergency aid programs to support their economies through the pandemic, governments across Europe are scaling back some of these measures, counting on burgeoning economic growth and the power of vaccines to carry the load from here.But the insurgent spread of the Delta variant of the coronavirus has thrown a new variable into that calculation, prompting concerns about whether this is the time for scheduled rollbacks in financial assistance.The tension can be seen in France, where the number of virus cases has increased more than 200 percent from the average two weeks …
