With all the different configurations, it is hard to judge exactly what you removed. As Pat says, a Startup Repair, run possibly 3 times may get you booting again. But if the partition you deleted was the active partition, you will need to make another one active. Startup repair will work in many cases, but it does have a hard time making a partition active.
Let us know how it goes, and if it doesn't work, you might think about getting a bootable version of Partition Wizard to look at your drives and perhaps get a picture you could attach showing your partitions.
Do you happen to know what type of partition it was you removed?